Improvement in dredging-machines



' botozn of die ment to any angledesiimd.

on ilielinca .v

JOHN MCCLEAN,OF Nidi-V ORLEANS, LOUISIANA.

lli/IPROVEMENT IN D'REDGlNG-MACl-HNES.

Spcciiicaiion forming parl yof Letters Patent No. Bb, dated April 12, 1870.

scraped and the ol `rLing debris drawn out oiitanddci iiacescrpaclged upon Fdieboetdireet, Y ,pion-el machinet e i'raine consisting! engin, the drawings bont 'sixty feet long', and

its bankshy'rici without ih.

repre 1 4 atmen er et one end by srong g tweny reet wide, end brace the with suite )le metal` bends or r ds.

his' iiaineint its cenier,is.hnng upon bear pgs,

placed in the rear or stern of the beat, soi hat nearly one entire heli" or" it will extend beyond the saine. The other end of Jthe frame "Is attached to the deck of the boat by means o5 suitable pulleys and chains, so as to admit of ils being raised or lowered as required. To the nader side of the other end of this frainc is hinged a plow consisting of ai plate of iron about twenty-lire feet long and six feei' deep, and snitobi braced by n sirong' nietai reine and bands or simile? inaieriei. The iowerend oi the n iiied foris entire ih with los f "ha doive or iinir'ee A laced on a Li-tween each of these plo ille boii'nns o arc-S ploiy so formed connected by chains or ropes passing from pulleys alia-flied te the bottoni oi' iis freine to pnileys attached to the iront beam oi the end traine, so as to admit ci" iris adinet In ibe acc-oni; ving drna'inys.,q tiro 1i ren rcscnis :in isonielricai rien or pian el' 'the i, as attached to the rear oi'ille boat. Fig. rescnis a longiindinel section i., in

ofthe plowshares, and Fig. 4 a front View of the same.

A is the bout, B B the levers, and B the fnlcrum of the same; C, the end frame; l), the ploW;D,its plate. and d and d the plowshiires. The plowshares d are left onen to prevent their glutting. f

d2 is the plow-frame.

E is ajoint, by means of Whichtlie plow is attached to the end ofthe frame- C.

F F are double Wheel pulleys attached to the lower end f' the frame of 'the plow, and G Gr are single-wheelpulleys attached to the front beam of the end frame, C.

H H are chains connecting the plow D by means of the pulleys F and Gto the windlass'l.

i' fi are guide or friction wheels for the ropes or chains H H to rim on.`

J are pulley-wheels placed in theinner end of the levers i5, and K K are pulleys attached to the deck of the boat, and L is a chai-n or rope connecting the pulleys J J-end K K, and by means ofwhich the iilow-"i'cine is raised or loW- cred as desired.

M M are rods bracing the levers D.

The operation of my invention is als follows: The plow D is raised np on a line with the deck of the boat by means of the chains or ropes L L working in the pulleys J J and K K, and the i boat backed 'np the channel which it is desired. to blow end clean out. 0n arriving et the desired point the chains or ropes L .i are loosened and the levers dropped until the plow l) rests against the bottoni of the channel. The plow is their edosmd by means ol" the windlass I and the' nat started forward, which causes he dow to chance a .pa-ck the debris; up against the plete oi i; plow, which carries it to the point, where it desired to deposit it, when it z'. the plow by raising` it eind Liliane;l .a in the manner before described. to confine myseli to the (liniennereiil mentioned, butA leave o be mede :recording to the Character oi` lne, dredging lo be performed.

Having time elly described the nature and operation oi'ni invention, what. Iclaiin as ne w and desire io anrc hy Leiters Patent. isw

i. 'The ciilzfaiir ifraiw, consisting: of the iellanii r. :iiiiz-e'wlion provided with Si.. pulleys i? lig :intl relie ont,serape,ai1d clean the bol tom of th e Leonstructed as shown, :ind hung and ar, 1n testimony tht I einm the foregoing in- 'ranged so as to admit of the plow beingraised venlion I have hereunto Set my 'hand Lids l5th or' lowered as desired, as herein set forth and Aday of February, 187 0.

v described.

2; The plow n, @mining ofthe plow-plate -JOHN MCCLEAN. D", plows d and d', plow-frame d2, attached to 1 the frame C,'a.s shown, and provided with the \Vitncsses:

pnlleys-F Grand rope H, so as to admit of its CHARLES MOLTOR, angle being' determined or adjusted ns desired, F3131) M. MOHRMANN.

as'herein setforth and described. 

